Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6612753 | Electrochimica Acta | 2014 | 8 Pages |
Abstract
Manganese (II) oxide (MnO) nanoparticles with nitrogen-doped (N-doped) carbon coating were fabricated via an efficient carbonization process using pyrrole, acrylonitrile and pyridine as different carbon sources, respectively. High-resolution transmission electron microscopy (HR-TEM) characterizations reveal the uniform carbon coating on the MnO nanoparticles. X-ray photoelectron spectroscopy (XPS) measurements demonstrate the presence of pyridinic N and pyrrolic N in the carbon coating. The nanocomposite using pyridine as carbon source exhibited superior cycling and rate performance, which could deliver a reversible capacity of 634Â mAh gâ1 after 100 cycles at a current density of 100Â mA gâ1 and the capacities of 591, 510, 440, 310 mAh gâ1 at 100, 200, 400 and 800Â mA gâ1, respectively. From the comparison of the electrochemical performances of the MnO and N-doped carbon nanocoposites derived from different carbon sources, pyridinic N contributes more to the improvement of cycling performance and rate capability than pyrrolic N.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Guixia Lu, Song Qiu, Hailong Lv, Ya Fu, Jiurong Liu, Xiaoyu Li, Yu-Jun Bai,